Q: Replaced the transmission with a 04 tranny and it shifts funny when I I'm coming to a stop. It's like a straight shift sometimes

asked by on

Changed trannys put a 05 trans in it an it shifts but it don't gear itself down like it should. An don't seem to have power like the other tranny I put the natural safety switch off my o2 on it case the plug wasn't the same on the o5 granny on the neutral safety switch could this be my problem.

My car has 190000 miles.
My car has an automatic transmission.

Hi there. The problem is the generation of the transmission is different, meaning the wiring harness inside the transmission is different. However, the range selector will not cause the transmission to not shift to the lower gears. The newer version of the transmission is designed to downshift when under throttle conditions and not under speed conditions.

GM has designed their new transmissions like this because drivers were complaining that the vehicle will jerk around as the transmission down shifted. The transmission will down shift back to 1st gear when the vehicle is at 5 mph or less. The other times when the vehicle is slowed down, when the driver demands more throttle, the transmission will downshift to allow the transmission to apply torque. There is nothing wrong with the transmission. If you have an issue with the transmission shifting manually, then replace the range selector. If you need further assistance diagnosing your vehicle’s shifting problem, then seek out a professional, such as one from YourMechanic, to help resolve this problem.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. Replaced the transmission with a 04 tranny and it shifts funny when I I'm coming to a stop. It's like a straight shift sometimes

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Engine light is on and sometimes the power in the engine reduces

I believe that the speedometer needle going up as the car is started is a factory feature that was added by Chevrolet on purpose. As for the acceleration issue, I would recommend having the vehicle scanned for trouble codes with...

Q: Truck won't shift out of reverse but the shifter is in park.

Hi there. There are two different things that could be happening. Either the shifter cable is broken and came off the shifter linkage on the transmission or the transmission rod inside the transmission pan that connects to the main valve...

Q: Q: Gear shift lever stuck in Park

This is a very common problem for your type of vehicle. Often, there is a component in the shifter mechanism that fails, and causes the shifter to be unable to come out of Park. The repair for this is to...

Related articles

How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.